X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FCursor.h;h=d5b5aa43ca3c646756a745926045f6b27bb6bd94;hb=49ac79100bc36bcd8e54c0224596ae36af9c3c77;hp=3cfdd009fe8c54ce6ce34d36afdd04d34b7ba1b5;hpb=6eea764eadb87b28e48dd5ca7464795bb4bc8cbe;p=lyx.git diff --git a/src/Cursor.h b/src/Cursor.h index 3cfdd009fe..d5b5aa43ca 100644 --- a/src/Cursor.h +++ b/src/Cursor.h @@ -9,6 +9,47 @@ * Full author contact details are available in file CREDITS. */ +/* +First some explanation about what a Cursor really is. I try to go from +more local to general. + +* a CursorSlice indicates the position of the cursor at local level. +It contains in particular: + * idx(): the cell that contains the cursor (for Tabular or math + arrays). Always 0 for 'plain' insets + * pit(): the index of the current paragraph (only for Texted) + * pos(): the position in the current paragraph (or in the math + equation in Mathed). + * inset(): the inset in which the cursor is. + +* a DocIterator indicated the position of the cursor in the document. + It knows about the current buffer (buffer() method) and contains a + vector of CursorSlices that describes the nesting of insets up to the + point of interest. Note that operator<< has been implemented, so that + one can send a DocIterator to a stream to see its value. Try it, it is + very helpful to understand the cursor layout. + * when using idx/pit/pos on a DocIterator, one gets the information + from the inner slice (this slice can be accessed as top()) + * inMathed() returns true when the cursor is in a math formula + * inTexted() returns true when the cursor is in text + * innerTextSlice() returns the deepest slice that is text (useful + when one is in a math equation and looks for the enclosing text) + +* A CursorData is a descendent of Dociterator that contains + * a second DocIterator object, the anchor, that is useful when + selecting. + * some other data not interesting here +This class is used only for undo and contains the Cursor element that +are not GUI-related. In LyX 2.0, Cursor was directly deriving from +DocIterator + +* A Cursor is a descendant of CursorData that contains interesting + display-related information, in particular targetX(), the horizontal + position of the cursor in pixels. + * one interesting method for what you want to do is textRow(), that + returns the inner Row object that contains the cursor +*/ + #ifndef LCURSOR_H #define LCURSOR_H @@ -19,8 +60,6 @@ #include "mathed/MathParser_flags.h" -#include - namespace lyx { @@ -34,9 +73,63 @@ class Row; class InsetMathUnknown; class Encoding; +/** + * This class describes the position of a cursor within a document, + * but does not contain any detail about the view. It is currently + * only used to save cursor position in Undo, but culd be extended to + * handle the methods that only need this data. + **/ +class CursorData : public DocIterator +{ +public: + /// + CursorData(); + /// + explicit CursorData(Buffer * buffer); + /// + explicit CursorData(DocIterator const & dit); + /// output + friend std::ostream & operator<<(std::ostream & os, CursorData const & cur); + friend LyXErr & operator<<(LyXErr & os, CursorData const & cur); + +protected: + /// the anchor position + DocIterator anchor_; + /// + mutable DispatchResult disp_; + /// do we have a selection? + bool selection_; + /// are we on the way to get one? + bool mark_; + /// are we in word-selection mode? This is set when double clicking. + bool word_selection_; + /// If true, we are behind the previous char, otherwise we are in front + // of the next char. This only make a difference when we are in front + // of a big inset spanning a whole row and computing coordinates for + // displaying the cursor. + bool logicalpos_; + +// FIXME: make them protected. +public: + /// the current font settings + Font current_font; + /// the current font + Font real_current_font; + +protected: + + // + // math specific stuff that could be promoted to "global" later + // + /// do we allow autocorrection + bool autocorrect_; + /// are we entering a macro name? + bool macromode_; +}; + /// The cursor class describes the position of a cursor within a document. -class Cursor : public DocIterator +class Cursor : public CursorData { public: /// create the cursor of a BufferView @@ -60,6 +153,8 @@ public: bool popForward(); /// make sure we are outside of given inset void leaveInset(Inset const & inset); + /// set the cursor data + void setCursorData(CursorData const & data); /// sets cursor part void setCursor(DocIterator const & it); /// sets the cursor to the normalized selection anchor @@ -101,7 +196,7 @@ public: CursorSlice selEnd() const; /// access start of selection DocIterator selectionBegin() const; - /// access start of selection + /// access end of selection DocIterator selectionEnd() const; /** * Update the selection status and save permanent @@ -248,12 +343,11 @@ public: */ void noScreenUpdate() const; /// fix cursor in circumstances that should never happen. - /// \retval true if a fix occured. + /// \retval true if a fix occurred. bool fixIfBroken(); - - /// output - friend std::ostream & operator<<(std::ostream & os, Cursor const & cur); - friend LyXErr & operator<<(LyXErr & os, Cursor const & cur); + /// Repopulate the slices insets from bottom to top. Useful + /// for stable iterators or Undo data. + void sanitize(); /// bool textUndo(); @@ -284,7 +378,10 @@ public: Inset const * inset = 0) const; /// Convenience: prepare undo for the whole buffer - void recordUndoFullDocument() const; + void recordUndoFullBuffer() const; + + /// Convenience: prepare undo for buffer parameters + void recordUndoBufferParams() const; /// Convenience: prepare undo for the selected paragraphs or cells void recordUndoSelection() const; @@ -292,6 +389,15 @@ public: /// void checkBufferStructure(); + /// hook for text input to maintain the "new born word" + void markNewWordPosition(); + + /// The position of the new born word + /// As the user is entering a word without leaving it + /// the result is not empty. When not in text mode + /// and after leaving the word the result is empty. + DocIterator newWord() const { return new_word_; } + public: //private: @@ -300,11 +406,15 @@ public: /// void saveBeforeDispatchPosXY(); +private: + /// validate the "new born word" position + void checkNewWordPosition(); + /// clear the "new born word" position + void clearNewWordPosition(); + private: /// BufferView * bv_; - /// the anchor position - DocIterator anchor_; /// mutable DispatchResult disp_; /** @@ -322,42 +432,14 @@ private: int x_target_; /// if a x_target cannot be hit exactly in a text, put the difference here int textTargetOffset_; - /// do we have a selection? - bool selection_; - /// are we on the way to get one? - bool mark_; - /// are we in word-selection mode? This is set when double clicking. - bool word_selection_; - /// If true, we are behind the previous char, otherwise we are in front - // of the next char. This only make a difference when we are in front - // of a big inset spanning a whole row and computing coordinates for - // displaying the cursor. - bool logicalpos_; + /// the start of the new born word + DocIterator new_word_; /// position before dispatch started DocIterator beforeDispatchCursor_; /// cursor screen coordinates before dispatch started int beforeDispatchPosX_; int beforeDispatchPosY_; - -// FIXME: make them private. -public: - /// the current font settings - Font current_font; - /// the current font - Font real_current_font; - -private: - - // - // math specific stuff that could be promoted to "global" later - // - /// do we allow autocorrection - bool autocorrect_; - /// are we entering a macro name? - bool macromode_; - - /////////////////////////////////////////////////////////////////// // // The part below is the non-integrated rest of the original math @@ -396,8 +478,8 @@ public: void plainInsert(MathAtom const & at); /// void niceInsert(MathAtom const & at); - /// - void niceInsert(docstring const & str, Parse::flags f = Parse::NORMAL, + /// return the number of inserted array items + int niceInsert(docstring const & str, Parse::flags f = Parse::NORMAL, bool enter = true); /// in pixels from top of screen